6663553355 has 16 divisors (see below), whose sum is σ = 8053525440. Its totient is φ = 5292723072.

The previous prime is 6663553349. The next prime is 6663553373. The reversal of 6663553355 is 5533553666.

It is a cyclic number.

It is not a de Polignac number, because 6663553355 - 2²⁴ = 6646776139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339082 + ... + 1344048.

It is an arithmetic number, because the mean of its divisors is an integer number (503345340).

Almost surely, 2^6663553355 is an apocalyptic number.

6663553355 is a deficient number, since it is larger than the sum of its proper divisors (1389972085).

6663553355 is a wasteful number, since it uses less digits than its factorization.

6663553355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838.

The product of its digits is 3645000, while the sum is 47.

The square root of 6663553355 is about 81630.5908039382. The cubic root of 6663553355 is about 1881.7790382995.

The spelling of 6663553355 in words is "six billion, six hundred sixty-three million, five hundred fifty-three thousand, three hundred fifty-five".